9 sides
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Nona plus 1 = Deca
9. The prefix nona means 9.
You don't, because there is no such thing as a nonogon. It is a nonagon. And you could try alternating ns in the two words: nine and nona...
'Hepta' from Latin for '7' means the polygon has '7' sides. Similarly 'nona' from Latin for '9' means the polygon has '9' sides. Simnce there are 1 heptagon and 2 nonagons. then the number of sides is 7 + 9 + 9 = 7 + (2x9) = 7 + 18 = 25 The answer!!!!!
Pentagon is 5 sided. From Latin the names ore Tri = 3 ( As trigon / triangle) Quad = 4 Penta = 5 Hexa = 6 Hepta = 7 Octa = 8 Nona = 9 Decs = 10 Centa = 100 ( AS centagon - 100sides). Kilo = 1000